It is exactly what is taught by the holy scriptures. Just read all of Romans chapter 4.
It is simply the gospel of Jesus Christ that He was punished for and took the penalty for our sins (1 Corinthians 15:1-4).
How can you justify yourself as righteous for reading a certain chapter in the bible? It's a modern trend. The whole weight of teaching in both testaments is against self-justification.
Jesus was punished for our sins. That is a mark against us. And we are still doing the same thing when we seek to keep our natural life intact by claiming the death of Jesus for ourselves...as if He was our Lamb to sacrifice...without actually surrendering our lives to God.
So then we tend to do the carnal easy things and fully miss what it means to go to the cross ourselves in order to fulfill the law of Christ. Jesus is safe on the cross. We like what He can do for us...but follow Him in death??? Not so much.
It is too easy to justify oneself and do as the crucifiers did...in order to avoid the cross of Christ for ourselves.